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SATA CD/DVD drive (instead of IDE)

74.9.42.114

In Reply to: RE: cMP - the open source high-end Memory Player posted by cics on December 30, 2007 at 05:42:01

Is there any reason why the cMP installation guide suggests an IDE-based CD/DVD drive instead of one with a SATA interface?

The installation guide says to use a "Basic" drive (or one with low power requirements, i.e. a basic LG). Unfortunately, Newegg, doesn't list the power specs so I ended up ordering an inexpensive LG (w/ SATA interface) and hoped for the best. Additionally, I thought that the SATA interface would give me the benefit of not having to use Granite Digital's IDE/SATA to USB bridge.

I just received it the DVD drive and the power specs are listed as:

5V / 12V == 1.5A / 2.0A

I don't recall seeing the multiple current specs on other DVD drives I've looked at so I don't know what that means.

Ultimately, does this suggest that this drive is not optimal for cMP usage? Will it require ANOTHER Granite Digital external power supply?

Thanks,
Chris

Follow Ups:

SATA ROM drives can be used as long as total power consumption doesn't exceed GD PS limit - cics 07:47:44 11/19/08 (1)
Your 12V specs is at the limit of GD PS. Also, with SATA there's no need to convert to USB.

Seger's advice is best, i.e. rather not install a ROM drive.
- RE: SATA ROM drives can be used as long as total power consumption doesn't exceed GD PS limit - ckniker 08:08:14 11/19/08 (0)
  > Seger's advice is best, i.e. rather not install a ROM drive.
  
  agreed.
  
  My question arose from the fact that my LG SATA DVD drive listed TWO specs (1.5A @ 5V and 2.0A @ 12V). This boils down to the question: "when is the 5V power rail used (reading?) and when is the 12v rail used (burning?)".
  
  I'm following your guide and have installed a .5A laptop drive. I'd like to additionally install the DVD drive (for the rare occasion that I need to rip on the cMP machine). If the DVD drive only consumes 1.5A for all my needs (ripping) then I should be OK using it and the laptop drive with the same GD PS.
  
  p.s. Yes, I know there's no need to convert to USB. That's why I went with the SATA DVD option. One interesting thing I discovered, however: My SATA drives (HD and DVD) are being mapped to IDE devices. The channel and Slave/Master ID's are dependent on which mobo SATA connector I connect to. Does this suggest there's a cMP recommended SATA configuration?
  
  Thanks,
  Chris
RE: SATA CD/DVD drive (instead of IDE) - seger 12:33:30 11/13/08 (0)
2.0A is right at the GD limit. But there is no need to have your DVD drive connected up except when installing Windows - do your ripping on another computer and transfer files to your cMP computer with a flash drive.

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